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R. H. CARPMAEL AND J. C. SOTHAM. APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE SETTING OF THE SAME. APPLICATION FILED DEC. 16. L918.

1 ,305,878. Patented June 3, 1919.

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' R. H-. CARPMAEL AND I. C. SOTHAM.

APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE.SETTING OF THE SAME.

V I APPLICATION FILED DEC. 16, 1918- 1,305,878., PatenteflJune 3,1919.

5 SHEETS-SHEET 2.

Mail/MM R. H. CARPMAEL AND .I. C. SOTHAIVI. APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE SETTING OF THE SAME. APPLICATION FILED DEC. I6. I9I8.

1,305,878, PatentdJune 3,1919.

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APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE SETTING OF THE SAME.

' APPLICATION FILED DEC. 16. 1918.

1,305,878. I Patented June 3, 1919.

5 SHEETS-SHEET 4.

'rNE NORRIS PETERS co rm m0" wnsmuarau. u. c

RI H. CARPMAEL'AND I. C. SOTHAM.

APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE SETTING OF THE SAME. APPLICATION FILED DEC. I6 I918.

1,305,878. Patented June 3, 1919.

5 SHEETS-SHEET 5.

W Awmat! OAJ "5M UNITED STATES PATENT OFFICE.

RICHARD HERBERT CARPMAEL AND JOHN CLIFFORD SOTHAlVI, OF COVENTRY, ENGLAND, ASSIGNORS TO THE COVENTRYORDNANCE WORKS, LIMITED, OF

COVENTRY, ENGLAND.

APPARATUS FOR AUTOMATICALLY SETTING TOOLS OR FOR FACILITATING THE SETTING OF THE SAME.

Application filed December 16, 1918. Serial No. 267,066.

- ing or abrading machines or for facilitating the setting of the same with relation to the work. The term tool is therefore to be understood as including a cutting tool, an abrading wheel or the like.

According to this invention a deviation from a normal size of the work is indicated through the movement of a movable member of a gage maintained in contact with the work, and hydrostatic means are, provided for magnifying such movement.

WVhen the tool is to be set automatically.

or semi-automatically the'movemen-t of the liquid is utilized to move the tool; for example, by starting an electric motor.

When desired the magnified deviation from the normal of the portion of the work 'just tooled is indicated by an audible signal,

or by the movement of liquid in a tube or the deviation in either direction may be in-v dicated by different colored lamps. The operator then knows whether the tool should be fed in or away from the work. 7

The accompanying drawings illustrate the invention as applied to semi-automatic means fixed to a lathe for setting a tool.

In the drawings Figural is an end elevation partly in section, Fig. 2 is a front elevation, Fig. 3 is a plan of the cylinder head.

and the locking plate preventing the piston turning. in, the cylinder, Fig. 4 is a section on the line 4.4: of Fig. 3, Fig. 5 is a section on the line 55 of Fig. Band Fig. 6 is a sec-.,

tion oneither of the lines 6-6 Fig. 5, Fig. 7 is a plan ofthe mechanism for setting a tool on the closing of an electric ourrentand Fig. 8 is an elevation partly 'in section of the same. f

Figs. 9, 10 and 11 show'means for automatically and continuously altering the position of the movable gage member with relation to its piston when it is desired to make tapered work, Fig. 9 being a detail, Fig. 10 a plan and Fig. 11 a section on the line 11- 11 of Fig. 10.

Referring more particularly to Figs. 1 and 2, 1 is the lathe saddle, 2 a base plate fixed to the saddle; 3 is a socket fixed to the plate into which screws a hollow pillar 4: containing a spring 5 which presses a frame 6 upward. The lower portion of the frame carries a roller 7 and the upper portion a roller 8 the roller 7'is forced to bear against the work 9 by the spring 5 whose power is adjusted by means of a screwed rod 10; the rollers 7 and 8 are situated a little in rear of the line of work.

As illustrated in Fig. 4:, the roller 8 is mounted at the end of a screw. threaded spindle 12, screwing into a socket 13 forming an extension of and connected to the trunk 14 of a piston 15 working in a cylinder 16. 17 is a spring tending to move the piston 15 downward and therefore to keep the roller 8 in contact with the work. 18 is a micrometer wheel fast with the socket 13 and provided with graduations which correspond with the diameter of the finished work, and 19 is a pointer opposite which the required graduation is placed. The micrometer wheel 18 when turned in either direction alters the position of the piston 15 relatively to the spindle 12, the piston being prevented from turning by a locking plate 20.

The cylinder 16 contains oil or other fluid on both faces of the piston 15 and is provided as shown in Fig. 5 with passages 21 and 22 for the escape of air and with passages 23 and 24: which convey oil from above and below the piston 15 to U shaped glass tubes 25 and 26 containing mercury 27 As illustrated in Fig. 6 each tube 25 and v 26 contains a terminal 28 which when in contact with the mercury 27 forms part of an electric circuit which comprises one of the pair, of solenoids 29 or 30 shown in Figs. 2,7 and 8.

Each core of the solenoids 29 and 80 is connected to a plunger 31 moving when the core is sucked in against the action of a spring 32. The plungers 31 terminate in a nob 33 upon which the ends of projec- Patented June 3-, 1919.

quarters of an inch correctlyturn'ed-to the: required. d-i-ameter-.; The rollers 'Z and 8 are.

tions 34 on balance weights 35 normally rest. The weights 35 are carried by sleeves 36 which turn upon a bush 37 which surrounds apa-ir of ratchets 38; and-the-ratchets 38 aremounted on a-square-40 on the shaft 39. The bush 37 is provided with a pair of slots 41, one for eachratchehtwhich.

have teeth arranged in opposite directions.v

The sleeves 36 are provided with sockets 42' which contain a plunger 43 terminating in a pawl 44 and pressed by a spring 45 normally against the bush 37}, but when aaesleeve 36 is turned by its weight 35 in one direction or the other oneot the pa-wls 44 passesthrough its slot. 41 and; engages i with the ratchet 3,8 and operates it and so turns-the shaft 39 which operates the small lide restcarrying the tool.

The apparatus works as followsi-the apparatus is. placed; in: Position on alathe, the Work-to'b'e tooledbeing for about three then placed, in contact with the tooled work and. the piston;15- adjusted so, that ,itiis in its mid position, and this ,will bring the; grade nation required on the micrometer whee-l LS- correspondingto the diameter required; o-p-v posite the pointer 19. I The1 terminals 28 are connected to relay circuits o t lowr-voltage which. operate a pair of small-;solenoids not; shown which, .'.b1lI1ginto. OPQBELl/IOII L a. h gh,-

voltage currentflwhich operatesthe large solenoids 29 and 30, the mercury;- 27? in the glass tubes25, and .26 being about 0.15 to 0.25. of an inch-from-the endiof theterminals 28 according" to the accuracy of'work desired.

The lathe is-nowsetintmotion. andwsolong as the cut of thetool-is correctin'o; actiontakes place,. -butl-so soonas an'inaccuracyh occurs, which causes toolittle cut, theroller 8 is forced upward, and therefore moves thepiston 15 upward'which delivers oil through the passage 23 V on to the =mercury- 27 in the r! U tube 26v which-thuscomes into contactwith the terminal 28 and so closes the relay circuit including a solenoid 29 or 30;,the energized solenoid sucks. in its .corenwhich draws backits springtplunger 31 thus with:-

drawing' its nobrs33 from beneathflits: pro-1 jection 34 and so rel ases its weight 3-5.. V

The sleeve 36 turns and sobringsthe. pawl 44 into theslot. 41 thus allowing the :spring 45 to pusha pawl 44 intoengagement: with back to its standard size the solenoidz2il or 30 is denergizeigthenob 33 on the plunger 31. Wlll, againibe in position to retain. the

corresponding projection. on the weight 35:

and the pawl. 44 willvride up upon the bush If the work. isstilliof greater diameter 29 or 3.0 is. energized.

This" apparatus is also useful for tooling taperedwork such as required for gun making" as mechanism can be devisedforautomatically; andcontinuously turning the micrometer wheel to the extent required.

Thus the lathe, maybe provided-with, asta-tiona-ry raclewhich gears with a; spur wheehmoving with. the lathe saddle; the spindleof the spur; Wheel; then through-suitable gearing drivesthe micrometer Wheel. r

I In orzder that difiierent. tapers may be cut thedrive takes place through change speed s a a Referringto Figs. 2,i9,:10-and 11', 45 is the stationary rack 46 thespindle fixed to the lathe, saddlev and to: which are :keyed a spur wheel-47;i1 1 gea 'r with therack-45v andza spur Wheel}, 48;driving1 a,-toothed wheelv 49. V I. The wheel- 49, isfast with a spindle. 50 pro-- vided'with agroove 5], and on -which; is slide ably mounted a sleeve/52 whichcarriesa toothed (wheel; 53 free to: turn on it but rotating; With: the spindle 50.: Gearing, with the-wheel 5.3 isa wheel 54carried by an arm 55- fast with thesleeve;52,which according as the'sleeve isslidden; on its spindle 50- can be brou lit-opposite anv-oneof-ifourigear wheels 56,5 58 or 59, which drive aspur wheel 60 in mesh with the micrometer wheel 18.

For the purpose of changing gear. to the top of the sleeve 52=is fixed a lever 61 whose ends-engage, with. two off fourc pairs of 1 stepped surfaces 62 and which can be-rnaim tainedin either; of its. 0111? positions by a; spini63. I b p I To change gear the pin .63 is removed fromits holeand the .l'everfil placed on one of the pair otstepped; surfaces; 62 desired, thus both sliding the sleeve 52 on thespindle, 5 0 andturning the arm. 551:0 bring the wheel 54 into: meshv with the gear wheel} 5 6.59 selected- I The tool settingrarrangementanay be made wholly automatic ifg-an electric'motoriis arranged toifeed the toolvin oroutaccording as, it is set. in rotationwin one direction ,or the other for this purposetheterminals inthe- 12 U tubes are-arranged in; circuits which when, closed by the mercury l112tlil6 tulbesrstart the motor in difi'erent directionsv Theapparatustmayalso be-adapted-to cut. or abrade hollow work.

Whengreat-aecuracyis not desired the. lower rollers may be omitted.

1. Apparatus ?for facilitating; the setting;- of tools which comprisesflztiool; ajspindley whose end is maintained in contact with the work while the machine is running, a piston connected to the spindle, a cylinder containing liquid, and a passage connecting the cylinder with a tube, the said tube being smaller in cross section than the cylinder.

2. Apparatus for facilitating the setting of tools which comprises a tool, a spindle whose end is maintained in contact with the work while the machine is running, a piston connected to the spindle, a cylinder containing liquid, a passage connecting the cylinder with a tube, the said tube being smaller in cross section than the cylinder and means operated by the movement of the liquid for moving the tool.

3. Apparatus for facilitating the setting of tools which comprise a tool, a spindle whose end is maintained in contact with the work while the machine is running, a piston connected to. the spindle, means for altering the relation of the spindle with the piston, a cylinder containing liquid and a passage connecting the cylinder with a tube also containing liquid.

4. Apparatus for facilitating the setting of tools which comprise a tool, a gage situated near the tool, a piston operated by the movement of a movable portion of the gage, a cylinder containing liquid, a passage connecting the cylinder with a tube containing mercury, and a contact adapted to be touched by the mercury on the expulsion of liquid from the cylinder by the movement of the piston.

5. Apparatus comprising a tool, a gage situated near to the tool and having a movable member carried on a spindle, a piston connected to the spindle, means for altering the relation of the spindle with the piston, a cylinder containing liquid, a passage connecting the cylinder with a tube containing mercury and a contact adapted to be touched by the mercury on the expulsion of liquid from the cylinder by the movement of the piston.

6. Apparatus for facilitating the setting of tools which comprise a tool, a gage situated near to the tool, a piston operated by the movement of a movable portion of the gage, a cylinder containing liquid, a passage connecting the cylinder with a tube containing mercury, a contact adapted to be touched by the mercury on the expulsion of liquid from the cylinder by the movement of the piston, and electrically operated means for feeding the tool.

7 Apparatus for facilitating the setting of tools which comprise a tool, a gage situated near to the tool, a piston operated by the movement of a movable portion of the gage, a cylinder containing liquid, a passage connecting the cylinder with a tube containing mercury, a contact adapted to be touched by the mercury on the expulsion of liquid from the cylinder by the movement of the piston, a Weight whose fall is adapted to feed the tool and electrically operated means for releasing the weight.

8. Apparatus comprising a tool, a gage situated near to the tool and having a movable member carried on a spindle, a piston connected to the spindle, automatic means for altering the relation of the spindle, with the piston, a cylinder containing liquid and a passage connecting the cylinder with a tube containing liquid.

England, 19 Nov., 1918.

RICHARD HERBERT CARPMAEL. JOHN CLIFFORD SOTHAM.

Signed in the presence of- ARTHUR B. INSTONE, BERT J. KNIGHTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

